Here the government requires full privacy breach for buying a sim (because, of course, the terrorists and stuff). That with the inevitable hack that happens from time to time on telcoms it's just a matter of time of them spreading all the details the telcom have on me.
I think things will have to get worse for me to consider that option. But I am thinking about it. Still... there's no guarantee they won't block me since I won't use my real name or have any "friends" on it. I think if your account will clearly not give them money, they will block it.
So the phone is the difference that makes it work?
Did you use a fake name, do you have friends on it? If I go down that path I would want to make sure I have all ingredients for it to work.